JPH04125359U - Fall prevention device for elastically supported seismic isolation structures - Google Patents
Fall prevention device for elastically supported seismic isolation structuresInfo
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- JPH04125359U JPH04125359U JP5473491U JP5473491U JPH04125359U JP H04125359 U JPH04125359 U JP H04125359U JP 5473491 U JP5473491 U JP 5473491U JP 5473491 U JP5473491 U JP 5473491U JP H04125359 U JPH04125359 U JP H04125359U
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- rubber elastic
- prevention device
- fixing plate
- fall prevention
- seismic isolation
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- 230000002265 prevention Effects 0.000 title claims abstract description 40
- 238000002955 isolation Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims description 4
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- 230000000694 effects Effects 0.000 abstract description 14
- 229910000831 Steel Inorganic materials 0.000 description 39
- 239000010959 steel Substances 0.000 description 39
- 238000006073 displacement reaction Methods 0.000 description 26
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000013016 damping Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
(57)【要約】 (修正有)
【目的】 ゴム弾性支承によって支持され、該ゴム弾性
支承の免震作用を利用するいわゆる弾性支持免震構造物
に併置される転倒防止装置において、上部構造がどのよ
うに揺れても、上部構造の下部に配されたどの転倒防止
装置も有効に機能し、かつ、当該部分における破損原因
の解消を図ること。
【構成】 長尺の引張り材1の下端は下部構造Bに固定
され、その上端は滑動子3に固定され、該滑動子3は上
部構造Gに定着した定着板2に摺動自在に載置され、引
張り材1にはゴム弾性支承Rを圧縮する張力が導入され
てなる。
(57) [Summary] (with amendments) [Purpose] In a fall prevention device that is supported by rubber elastic bearings and installed in parallel with a so-called elastic support seismic isolation structure that utilizes the seismic isolation effect of the rubber elastic bearings, the upper structure is To ensure that any fall prevention device disposed at the lower part of a superstructure functions effectively no matter how it shakes, and to eliminate the cause of damage in that part. [Structure] The lower end of the elongated tension member 1 is fixed to the lower structure B, the upper end thereof is fixed to the slider 3, and the slider 3 is slidably placed on the fixing plate 2 fixed to the upper structure G. A tension force is introduced into the tension member 1 to compress the rubber elastic bearing R.
Description
【0001】 イ.考案の目的 (1) 産業上の利用分野 この考案は、ゴム弾性支承によって支持され、該ゴム弾性支承の免震作用を利 用するいわゆる弾性支持免震構造物に関し、更に詳しくは、該弾性支持免震構造 物の転倒防止装置に関する。0001 stomach. Purpose of invention (1) Industrial application field This device is supported by rubber elastic bearings and takes advantage of the seismic isolation effect of the rubber elastic bearings. Regarding the so-called elastic support seismic isolation structure used, more specifically, the elastic support seismic isolation structure Related to devices for preventing objects from falling.
【0002】 (2) 従来の技術 この種の免震構造物の転倒防止装置として、特開昭60−261870号公報 が公知である。 すなわち、該公知技術によれば、基礎上に複数のゴム弾性支承によって支持さ れる重心の高い高層建築物を対象とし、基礎と上部構造との間にケーブルが設け てあり、これらのケーブルが基礎及び上部構造の垂直方向空所内に配置してあり 、両端に前記空所の直径よりも幅の広いヘッドピースを備えており、上方のヘッ ドピース内に弾性詰物または詰物要素がすえ付けてある構成を採るものである。 しかして、この構成により、地震の発生により基礎が前後・左右動したとき、 基礎と上部構造との間に相対的変位が生じ、この変位をケーブルがその引張り抗 力により抵抗し、上部構造の転倒に至る過度な変位を阻止するというものである 。0002 (2) Conventional technology As a fall prevention device for this type of seismic isolation structure, Japanese Patent Application Laid-Open No. 60-261870 is publicly known. In other words, according to the known technology, the structure is supported by a plurality of rubber elastic bearings on the foundation. Targeting high-rise buildings with high centers of gravity, cables are installed between the foundation and superstructure. and these cables are located within the vertical cavities of the foundation and superstructure. , with a headpiece wider than the diameter of the cavity at each end, and an upper headpiece. An elastic padding or padding element is mounted within the pad piece. With this configuration, when the foundation moves back and forth or left and right due to an earthquake, A relative displacement occurs between the foundation and the superstructure, and the cable absorbs this displacement with its tensile resistance. The idea is to resist excessive force and prevent excessive displacement that could lead to the superstructure overturning. .
【0003】 しかしながら、上部構造の変位は実際的には、回転を伴う上下動要素すなわち ロッキング運動を含み、圧縮側に配されたこの装置においてはケーブルが無負荷 状態となり、当該部では機能を果さず、全体としての効果が半減し、更には、引 張り側になった際に衝撃が発生し、破損原因ともなる。 また、上部のヘッドピース部分においては、回転のみを許容するピン結合とな っているので、上部構造の変位がそのまま伝わり、当該変位の鉛直分は弾性詰物 の圧縮によって吸収され、この結果、該弾性詰物を過度に圧縮される等、該弾性 詰物部においても破損が生ずる事態となる。0003 However, the displacement of the superstructure is actually a vertically moving element with rotation, i.e. In this device, which includes a rocking motion and is placed on the compression side, the cable is unloaded. state, the relevant part does not function, the overall effectiveness is halved, and furthermore, the When it is on the tension side, a shock occurs, which can cause damage. In addition, the upper headpiece part is a pin connection that only allows rotation. , so the displacement of the upper structure is transmitted as is, and the vertical portion of the displacement is transferred to the elastic filling. This causes the elastic filling to become overly compressed, resulting in the elastic filling being absorbed by compression. This may also cause damage to the filling part.
【0004】 (3) 考案が解決しようとする問題点 本考案は上記実情に鑑みなされたものであり、免震構造物の下部に配されるこ の種の複数の転倒防止装置において、上部構造がどのように揺れても、上部構造 の下部に配されたどの転倒防止装置も有効に機能し、かつ、当該部分における破 損原因の解消を図ることを目的とする。0004 (3) The problem that the idea aims to solve The present invention was developed in view of the above-mentioned circumstances, and is designed to be placed at the bottom of a seismic isolation structure. In multiple types of fall protection devices, no matter how the superstructure shakes, the superstructure Any fall prevention device placed at the bottom of the The purpose is to eliminate the cause of loss.
【0005】 ロ. 考案の構成 (1) 問題点を解決するための手段 本考案の弾性支持免震構造物の転倒防止装置は上記目的を達成するため、次の 技術的手段(構成)を採る。 第1番目の弾性支持免震構造物の転倒防止装置においては、上部構造と下部構 造との間の空間にゴム弾性支承が介装され、該ゴム弾性支承の鉛直剛性により上 部構造の荷重を支持し、その水平剛性により構造物間の横振動を吸収する構造系 において、長尺体よりなり、その下端部を下部構造に固定され、その上部を上部 構造の凹部内に突入される引張り材と;上部構造に固設され、前記引張り材をそ の中央に開設された孔部内に移動域を存して受け入れ、その上面がすべり面に形 成されてなる定着板と;前記定着板のすべり面に摺動自在に載置され、前記引張 り材の上端が固設される滑動子と;からなり、前記引張り材には、前記ゴム弾性 支承に載荷される支持荷重の所要割合の引張り力が導入されてなることを特徴と する。[0005] B. Structure of the idea (1) Means to solve the problem In order to achieve the above objectives, the fall prevention device for elastic support seismic isolation structures of the present invention has the following features: Adopt technical means (configuration). In the first type of fall prevention device for elastically supported seismic isolation structures, the upper and lower structures are A rubber elastic bearing is inserted in the space between the structure and the vertical rigidity of the rubber elastic bearing allows the upper A structural system that supports the loads of substructures and absorbs lateral vibrations between the structures through its horizontal rigidity. consists of a long body, its lower end is fixed to the lower structure, and its upper part is fixed to the upper structure. a tensile member inserted into a recess in the structure; A moving area exists in the hole opened in the center of the a fixing plate made of; a slider to which the upper end of the tensioning material is fixed; the tensioning material has the rubber elastic material; A tensile force corresponding to a required proportion of the supporting load loaded on the bearing is introduced. do.
【0006】 第2番目の弾性支持免震構造物の転倒防止装置においては、上部構造と下部構 造との間の空間にゴム弾性支承が介装され、該ゴム弾性支承の鉛直剛性により上 部構造の荷重を支持し、その水平剛性により構造物間の横振動を吸収する構造系 において、長尺体よりなり、その下端部を下部構造に固定され、その上部を上部 構造の凹部内に突入される引張り材と;上部構造に固設され、前記引張り材の上 端が固設される定着板と;からなり、前記引張り材には、前記ゴム弾性支承に載 荷される支持荷重の所要割合の引張り力が導入されてなる、ことを特徴とする。[0006] In the second fall prevention device for elastically supported seismic isolation structures, the upper and lower structures are A rubber elastic bearing is inserted in the space between the structure and the vertical rigidity of the rubber elastic bearing allows the upper A structural system that supports the loads of substructures and absorbs lateral vibrations between the structures through its horizontal rigidity. consists of a long body, its lower end is fixed to the lower structure, and its upper part is fixed to the upper structure. a tensile member inserted into a recess in the structure; a fixing plate having an end fixedly fixed thereto; It is characterized in that a tensile force of a required proportion of the supporting load to be applied is introduced.
【0007】 (2) 作用 地震により下部構造が水平振動すると、該下部構造と上部構造との間に相対的 変位が生じ、ゴム弾性支承上に支持された上部構造は長周期化された固有の振動 周期をもって振動する。 第1及び第2の本転倒防止装置においては、ともに、上部構造にロッキング運 動が生じても、その圧縮側においては、引張り力を失わず、常時張力を保持し、 引張り側となったとき、円滑な応力の変換が行われる。 第1の本転倒防止装置においては、更に、鋼棒の上部ではすべり変位が許容さ れ、上下部構造物間の変位に比べて可及的小さな変位にとどまり、該鋼棒の曲げ 変形量も小さく、ゴム弾性支承への負担が軽減される。[0007] (2) Effect When the substructure vibrates horizontally due to an earthquake, the relative vibration between the substructure and the superstructure increases. Displacement occurs, and the superstructure supported on rubber elastic bearings experiences long-period natural vibrations. It vibrates periodically. Both the first and second overturn prevention devices have a locking mechanism on the upper structure. Even if movement occurs, the tension is not lost on the compression side and the tension is always maintained. When it comes to the tensile side, smooth stress transformation occurs. In the first fall prevention device, furthermore, sliding displacement is not allowed at the top of the steel bar. The displacement is kept as small as possible compared to the displacement between the upper and lower structures, and the bending of the steel rod is The amount of deformation is also small, reducing the burden on the rubber elastic bearing.
【0008】 (3) 実施例 本考案の弾性支持免震構造物の転倒防止装置の実施例を図面に基づいて説明す る。 (第1実施例の構成) 図1及び図2はその一実施例の弾性支持免震構造物の転倒防止装置(以下単に 「転倒防止装置」という)を示す。すなわち、本実施例においてはゴム支承一体 型の転倒防止装置を示し、図1はこの転倒防止装置の全体の断面構造を示し、図 2はその変位状態を示す。[0008] (3) Examples An example of the fall prevention device for an elastic support seismic isolation structure of the present invention will be explained based on the drawings. Ru. (Configuration of the first embodiment) Figures 1 and 2 show an example of a fall prevention device for an elastically supported seismic isolation structure (hereinafter simply referred to as (referred to as "fall prevention device"). In other words, in this example, the rubber bearing is integrated. Figure 1 shows the overall cross-sectional structure of this type of fall prevention device. 2 indicates its displacement state.
【0009】 図1において、Bは地盤に打設された杭基礎等に連なる下部構造であり、Gは 建築物等の上部構造である。 Rはゴム弾性支承であり、上部構造Gと下部構造Bとの間の空間に所要数をも って介装され、上部構造Gの荷重を下部構造Bに伝達する。 しかして、本転倒防止装置Sは、このゴム弾性支承Rに付置して形成され、こ れらの下部構造Bと上部構造Gとの間に介装され、鋼棒1と定着板2と滑動子3 とを主要構成要素として構成される。[0009] In Figure 1, B is the lower structure connected to the pile foundation etc. driven into the ground, and G is the substructure connected to the pile foundation etc. driven into the ground. This is the superstructure of buildings, etc. R is a rubber elastic bearing, and the required number is provided in the space between the upper structure G and the lower structure B. is interposed to transmit the load of the upper structure G to the lower structure B. Therefore, the fall prevention device S is formed attached to this rubber elastic support R, and this A steel rod 1, a fixing plate 2, and a slider 3 are interposed between the lower structure B and the upper structure G. The main components are:
【0010】 もっと詳しくは、ゴム弾性支承Rは、中央には上下に貫通する比較的大径の中 央孔10が開設され、鋼板11とゴム体12とが交互に積層された積層ゴム体1 3を主体とし、上部に上部取付け板14、下部に下部取付け板15が固設されて なる。 そして、上部取付け板14は上部構造Gの下面に固設され、下部取付け板15 は下部構造Bに埋設定着された基台17上に固設される。 基台17にもゴム弾性支承Rの中央孔10に連なる中央孔18が開設される。 なお、該基台17は適宜省略されうる。 該ゴム弾性支承Rは当然のことながら、少なくとも上部構造Gを自立保持しう る個数をもって下部構造B上に配されるものである。0010 In more detail, the rubber elastic bearing R has a relatively large diameter inner part that penetrates vertically in the center. A laminated rubber body 1 in which a central hole 10 is opened and steel plates 11 and rubber bodies 12 are alternately laminated. 3 as the main body, an upper mounting plate 14 is fixed to the upper part, and a lower mounting plate 15 is fixed to the lower part. Become. The upper mounting plate 14 is fixed to the lower surface of the upper structure G, and the lower mounting plate 15 is fixed on a base 17 embedded in the lower structure B. The base 17 also has a center hole 18 connected to the center hole 10 of the rubber elastic support R. Note that the base 17 may be omitted as appropriate. Naturally, the rubber elastic support R is capable of independently holding at least the upper structure G. The number of pieces is arranged on the lower structure B.
【0011】 転倒防止装置Sにおいては、鋼棒1は、ゴム弾性支承R及び基台17の中央孔 10,18の孔軸上に沿い、その中間部を下部構造B内に形成された凹部20内 に配され、その下端部は下部構造Bに埋設固定され、その上端部はねじ部1aと され、上部構造Gの凹部21内に突設される。 下部構造Bに形成される下部凹部20は、基台17の中央孔18に嵌装して配 される保護管23によって形成される。保護管23は鋼棒1の曲げ変形を許容す べく所定の長さと内径とを有する。保護管23の底部には鋼棒1を接続する継ぎ 手管24が固設され、この接続管24より下部構造B内にアンカー部材25が延 設される。 上部構造Gの上部凹部21は、上部構造Gの下面に埋設された保護枠体27に よって形成される。[0011] In the fall prevention device S, the steel rod 1 is connected to the rubber elastic support R and the center hole of the base 17. along the hole axes of holes 10 and 18, and the intermediate portion thereof is placed in a recess 20 formed in the lower structure B. Its lower end is embedded and fixed in the lower structure B, and its upper end is connected to the threaded part 1a. and is provided in a protruding manner within the recess 21 of the upper structure G. The lower recess 20 formed in the lower structure B is arranged by fitting into the center hole 18 of the base 17. It is formed by a protective tube 23 that is The protection tube 23 allows bending deformation of the steel rod 1. It has a predetermined length and inner diameter. At the bottom of the protection tube 23 there is a joint for connecting the steel rod 1. A hand pipe 24 is fixedly installed, and an anchor member 25 extends from this connecting pipe 24 into the lower structure B. will be established. The upper recess 21 of the upper structure G is connected to a protective frame 27 buried in the lower surface of the upper structure G. Therefore, it is formed.
【0012】 定着板2はこの保護枠体27に囲撓され、上部凹部21の開口端に臨んで配さ れる。 定着板2は、所定厚さを有する剛性体よりなり、上面28が所定の曲率をもつ 凹曲面に形成され、中央にはゴム弾性支承Rの中央孔10に連なる中央孔29が 形成される。定着板2の固定は、ゴム弾性支承Rの上部取付け板14に定着され るか、保護枠体27に定着される。0012 The fixing plate 2 is surrounded by the protective frame 27 and is arranged facing the open end of the upper recess 21. It will be done. The fixing plate 2 is made of a rigid body having a predetermined thickness, and the upper surface 28 has a predetermined curvature. It is formed into a concave curved surface, and has a central hole 29 connected to the central hole 10 of the rubber elastic bearing R in the center. It is formed. The fixing plate 2 is fixed to the upper mounting plate 14 of the rubber elastic bearing R. Or, it is fixed to the protective frame 27.
【0013】 滑動子3は、所定厚さを保持した剛性の円板体よりなり、その外径は、定着板 2の中央孔29よりも十分に大きく、かつ、定着板2の最小差渡し距離よりも小 さくされる。そして、その下面31は、定着板2の上面28の凹曲面の曲率に合 致する凸曲面とされ、また、その中央には鋼棒1の上部が挿通される小孔の鋼棒 挿通孔32が開設されている。 該滑動子3は定着板2に載置され、定着板2の上面28の凹曲面に沿って滑動 自在となる。留意すべくは、滑動子3の移動によってもその鋼棒挿通孔3は実質 的に鋼棒1に拘束を加えないことである。[0013] The slider 3 is made of a rigid disk having a predetermined thickness, and its outer diameter is equal to that of the fixing plate. 2, and smaller than the minimum passing distance of the fixing plate 2. It will be cut. The lower surface 31 matches the curvature of the concave curved surface of the upper surface 28 of the fixing plate 2. A steel rod with a small hole in the center through which the upper part of the steel rod 1 is inserted. An insertion hole 32 is provided. The slider 3 is placed on the fixing plate 2 and slides along the concave curved surface of the upper surface 28 of the fixing plate 2. Become free. It should be noted that even when the slider 3 moves, the steel rod insertion hole 3 is substantially closed. Therefore, the steel rod 1 should not be restrained.
【0014】 鋼棒1の上部は、定着板2の中央孔29及び滑動子3の鋼棒挿通孔32内に挿 通され、滑動子3上に突設したねじ部1aにナット34が螺合される。 このようにして、鋼棒1にはナット34の締込みにより緊張力が導入される。 なお、鋼棒1の長さは、上下の固定点(23,34)間での曲げ変形の影響を 小さくするため、可及的長く採られることが好ましい。実構造物に対しては、例 えば5m程度とされる。[0014] The upper part of the steel rod 1 is inserted into the center hole 29 of the fixing plate 2 and the steel rod insertion hole 32 of the slider 3. The nut 34 is threaded onto the threaded portion 1a protruding from the slider 3. In this way, tension force is introduced into the steel rod 1 by tightening the nut 34. In addition, the length of the steel bar 1 takes into account the effect of bending deformation between the upper and lower fixed points (23, 34). In order to make it smaller, it is preferable to make it as long as possible. For real structures, e.g. For example, it is about 5 meters.
【0015】 このゴム支承一体型の転倒防止装置Sは、建物の下面のすべてに配される必要 はなく、ロッキング現象の現われる建物の周辺部へのみ配する態様を採ることが できる。この場合、建物の中心部付近は通常のゴム支承Rが配される。[0015] This fall prevention device S with integrated rubber support must be installed on the entire bottom of the building. Instead, it is possible to adopt a mode in which they are placed only in the periphery of buildings where the rocking phenomenon occurs. can. In this case, a normal rubber support R is placed near the center of the building.
【0016】 本実施例の転倒防止装置Sの設置において、ゴム弾性支承Rは上部構造Gの荷 重を受けてその積層ゴム体13は所定量の圧縮を受けるが、本転倒防止装置Sに おける鋼棒1のナット34による締込みにより鋼棒1に更に緊張力が付加され、 積層ゴム体13は緊張力に見合う分の圧縮変形を受ける。 因みに、付加緊張力は、ゴム弾性支承Rの支持荷重が200トンに対し、50 トン程度を目安とする。[0016] In the installation of the fall prevention device S of this embodiment, the rubber elastic support R is used for the load of the upper structure G. The laminated rubber body 13 is compressed by a predetermined amount due to the weight, but the fall prevention device S Further tension is added to the steel rod 1 by tightening the nut 34 of the steel rod 1 in the The laminated rubber body 13 undergoes compression deformation commensurate with the tension force. Incidentally, the additional tension is 50 tons when the support load of the rubber elastic bearing R is 200 tons. The standard is around a ton.
【0017】 (第1実施例の作用・効果) このように構成された実施例の転倒防止装置Sは、次のように作用する。 構造物自体の剛性によって耐えうる程度の外力、例えば風荷重程度のものが作 用したとき、この構造系においては、鋼棒1に付与された張力により、上下構造 G,Bは一体性を発揮し、上部構造Gは容易には振動しない。[0017] (Actions and effects of the first embodiment) The fall prevention device S of the embodiment configured as described above operates as follows. External forces that can be withstood by the rigidity of the structure itself, such as wind loads, are generated. When used, in this structural system, the tension applied to the steel rod 1 causes the upper and lower structures to G, B exhibit integrity and the superstructure G does not easily vibrate.
【0018】 構造系に過大な外力、換言すれば鋼棒の張力による定着力を上回る力、例えば 地震動による水平地震力が作用したとき、下部構造Bの水平振動に伴い、該下部 構造Bと上部構造Gとの間に相対的変位が惹起される。 上下構造G,B間に介装されたゴム弾性支承Rにより、上部構造Gは下部構造 Bの変位から絶縁され、その固有の長周期の振動周期をもって振動する。[0018] Excessive external force on the structural system, in other words, a force that exceeds the anchoring force due to the tension of the steel rod, e.g. When a horizontal seismic force due to earthquake motion acts, the lower structure A relative displacement is induced between structure B and superstructure G. Due to the rubber elastic bearing R interposed between the upper and lower structures G and B, the upper structure G is connected to the lower structure. It is insulated from the displacement of B and vibrates with its own long-period vibration period.
【0019】 図2はこの構造系の変位状態を示すものであって、上部構造Gがイ方向(下部 構造Bがロ方向)に最大に振れた状態を示す。 このとき、ゴム弾性支承Rは横方向へ最大の変形を受けている。[0019] Figure 2 shows the displacement state of this structural system, with the upper structure G moving in the A direction (lower part This shows the state in which structure B has swung to its maximum in the direction B). At this time, the rubber elastic support R is undergoing maximum deformation in the lateral direction.
【0020】 図2に示されるように、本転倒防止装置Sにおいては、上部構造Gの変位によ り、鋼棒1の上端1aも同方向への変位を受けて鋼棒1は曲げ変形する。この変 形により、鋼棒1は引張り抵抗を発揮し、上部構造Gの変位に抵抗し、かつまた 、引き戻し力を与えて、従って、上部構造Gの転倒防止機能を発揮する。 このとき、本実施例装置Sにおいては、定着板2と滑動子3とが摺動を許容さ れているので、鋼棒1の上端1aの変位は構造物G,B間の相対変位量よりも小 さく、従って、鋼棒1のたわみは小さく、鋼棒1に過大な応力が生じない。 更に、定着板2と滑動子3との曲面接触は、定位置すなわち中立位置に復帰し ようとする特性が働くとともに、定着板2と滑動子3とは面的に接したものであ るので、その当接面に摩擦抵抗力が生じ、地震動エネルギーを吸収して、振動の 減衰作用を生ずる。[0020] As shown in Fig. 2, in this fall prevention device S, the displacement of the upper structure G At the same time, the upper end 1a of the steel rod 1 is also displaced in the same direction, causing the steel rod 1 to bend and deform. this strange Due to its shape, the steel rod 1 exerts a tensile resistance, resists the displacement of the superstructure G, and also , provides a pullback force, thus exhibiting the overturn prevention function of the upper structure G. At this time, in the device S of this embodiment, the fixing plate 2 and the slider 3 are not allowed to slide. Therefore, the displacement of the upper end 1a of the steel rod 1 is smaller than the relative displacement between the structures G and B. Therefore, the deflection of the steel rod 1 is small, and no excessive stress is generated on the steel rod 1. Furthermore, the curved surface contact between the fixing plate 2 and the slider 3 returns to the normal position, that is, the neutral position. At the same time, the fixing plate 2 and slider 3 are in contact with each other surface-wise. As a result, frictional resistance is generated on the contact surface, which absorbs seismic motion energy and reduces vibration. Produces a damping effect.
【0021】 構造系の変位において、上部構造Gにロッキング現象が生じた際、引張り側に 配された本装置Sにおいては上述したとおりその鋼棒1が引張り抗力を発揮する 。 一方、圧縮側に配された本装置Sにおいては、鋼棒1に付与された張力により 、鋼棒1は無負荷状態更には圧縮状態とならず、鋼棒1の引張り抵抗力が維持さ れ、従って、転倒阻止機能が保持される。 これにより、全体的に転倒阻止機能を失うことがない。 地震動による水平振動はどの方向にも起こり、本装置Sにおいてはどの方向に も変位を許容できるので、無方向の水平振動に対応する。[0021] In the displacement of the structural system, when a locking phenomenon occurs in the upper structure G, the tension side In this device S, the steel rod 1 exerts a tensile drag force as described above. . On the other hand, in this device S placed on the compression side, the tension applied to the steel rod 1 , the steel bar 1 is in a no-load state and is not in a compressed state, and the tensile resistance of the steel bar 1 is maintained. Therefore, the fall prevention function is maintained. This prevents the overall fall prevention function from being lost. Horizontal vibrations due to earthquake motion occur in any direction, and this device S can Since it can also tolerate displacement, it can handle non-directional horizontal vibration.
【0022】 このように、本実施例の転倒防止装置Sによれば、上部構造Gにロッキング運 動が生じた際、圧縮側に配された本装置Sにおいても浮き上がりが生ぜず、有効 に機能するので、全体の転倒防止作用が向上する。 また、浮き上がりに直接的に抵抗する鋼棒1の上部はすべりが許容されるので 、当該部では構造物B,G間の相対的変位よりも小さくなり、鋼棒1の変位が小 さくなり、このため、過大な応力が生ぜず、破損の原因が減少する。更には、ゴ ム弾性支承Rへの負担が軽減し、ゴム弾性支承Rを破損させることはない。 本転倒防止装置Sにおける定着板2と滑動子3との摺動作用により、その摩擦 効果により構造物間の振動の減衰をなすことができ、かつ、それらの曲面接触に より、定位置への復帰作用が生じ、構造物間の振動の減衰に寄与する。[0022] In this way, according to the fall prevention device S of this embodiment, the upper structure G is provided with a locking mechanism. When movement occurs, this device S placed on the compression side does not lift up and is effective. This improves the overall fall prevention effect. In addition, since the upper part of the steel bar 1, which directly resists uplift, is allowed to slip, , in this part, the relative displacement between structures B and G is smaller, and the displacement of steel rod 1 is smaller. Therefore, excessive stress is not generated and the cause of failure is reduced. Furthermore, Go The load on the rubber elastic bearing R is reduced, and the rubber elastic bearing R is not damaged. Due to the sliding action between the fixing plate 2 and the slider 3 in this fall prevention device S, the friction This effect can attenuate vibrations between structures, and also reduce contact between curved surfaces. This causes a return action to the normal position, contributing to damping of vibrations between the structures.
【0023】 (第2実施例) 図3は本考案の他の実施例(第2実施例)を示す。図において、先の第1実施 例と同等の部材については同一の符号が付されている。 この実施例においては、ゴム弾性支承Rと転倒防止装置Sとは別体として上部 構造Gと下部構造Bとの間に介装される。 もっと詳しくは、このゴム弾性支承Rはゴム積層体の中心に鉛プラグ36が封 入されたいわゆる鉛封入ゴム支承が使用され、振動の減衰機能をもつ。 転倒防止装置Sにおいては、保護管23が単独で下部構造B中に埋設されてい ること、また、上部凹部21の開口端部に介装板37が配され、該介装板37を 介して定着板2が固設されること以外は、先の実施例に準じる。 本実施例においては、ゴム弾性支承Rと転倒防止装置Sとが別体となっている ので、転倒防止装置Sの配設が自由となり、最小限の配設により経済的に施工を 行うことができ、また、必要に応じてゴム弾性支承Rより多数配することができ 、更には増設も可能である。また、ゴム弾性支承Rには鉛プラグが封入され、そ の減衰性が付加されることにより、構造系として大きな減衰特性を得ることがで きる。[0023] (Second example) FIG. 3 shows another embodiment (second embodiment) of the present invention. In the figure, the first implementation The same reference numerals are given to the same members as in the example. In this embodiment, the rubber elastic bearing R and the fall prevention device S are separately installed in the upper part. It is interposed between structure G and lower structure B. More specifically, this rubber elastic bearing R has a lead plug 36 sealed in the center of the rubber laminate. A so-called lead-filled rubber bearing is used, which has a vibration damping function. In the fall prevention device S, the protective tube 23 is buried independently in the lower structure B. Furthermore, an intervening plate 37 is disposed at the open end of the upper recess 21, and the intervening plate 37 is The same applies to the previous embodiment except that the fixing plate 2 is fixedly installed through the fixing plate 2. In this embodiment, the rubber elastic bearing R and the fall prevention device S are separate bodies. Therefore, the fall prevention device S can be installed freely, and construction can be carried out economically with minimal installation. It is also possible to arrange a larger number of rubber elastic bearings R as necessary. , and further expansion is possible. In addition, a lead plug is enclosed in the rubber elastic bearing R. By adding damping properties, it is possible to obtain large damping characteristics as a structural system. Wear.
【0024】 (第3実施例) 図4は本考案の更に他の実施例(第3実施例)を示す。図において、先の2つ の実施例と同等の部材については同一の符号が付されている。 この実施例では、上部構造Gにおける凹部、及び鋼棒1の上部の固定態様の構 成以外は第1実施例と実質的に同一の構成を採る。 すなわち、上部構造Gの下面に所定厚さを有するスペーサ部材40が固設され 、該スペーサ部材40の中央には上部凹部21が形成される。また、該スペーサ 部材40の凹部21を塞ぐようにして、定着平板41が該スペーサ部材40に対 して固定される。そして、鋼棒1はその上端のねじ部1aを該定着平板41の中 央孔42に挿通され、該ねじ部1aに締付けナット43が螺装され、鋼棒1に緊 張力が導入される。 本実施例の弾性支持免震構造物の転倒防止装置によれば、先の実施例のように 定着部材すなわち定着平板にすべりが許容されていないので、該すべりの効果は 期待できないが、ロッキング運動における圧縮側の浮き上がり防止機能を発揮す ることにおいて先の実施例と変わるところはない。[0024] (Third example) FIG. 4 shows still another embodiment (third embodiment) of the present invention. In the diagram, the first two The same reference numerals are given to the same members as those in the embodiment. In this embodiment, a recess in the upper structure G and a structure for fixing the upper part of the steel rod 1 are shown. The configuration of this embodiment is substantially the same as that of the first embodiment except for the above configuration. That is, a spacer member 40 having a predetermined thickness is fixed to the lower surface of the upper structure G. , an upper recess 21 is formed in the center of the spacer member 40 . In addition, the spacer The fixing plate 41 is placed against the spacer member 40 so as to close the recess 21 of the member 40. and fixed. Then, the steel rod 1 has its upper end threaded portion 1a inserted into the fixing plate 41. It is inserted into the central hole 42, a tightening nut 43 is screwed onto the threaded portion 1a, and the steel rod 1 is tightened. Tension is introduced. According to the fall prevention device for an elastically supported seismic isolation structure of this embodiment, as in the previous embodiment, Since the fixing member, i.e., the fixing plate, is not allowed to slip, the effect of the slip is Although not expected, it exhibits a function to prevent lifting on the compression side during rocking motion. There is no difference from the previous embodiment in this respect.
【0025】 本考案は上記実施例に限定されるものではなく、本考案の基本的技術思想の範 囲内で種々設計変更が可能である。すなわち、以下の態様は本考案の技術的範囲 内に包含されるものである。 叙上の各実施例では引張り材1として鋼棒が使用されたが、鋼索、あるいはF RP製ロッドであってもよい。 第1・第2実施例において、定着板2と滑動子3とのすべり面を互いに平面接 触とすること。この場合、引張り材1の滑動子3への固定は回転変位を許容する ピン固定が好ましい。[0025] The present invention is not limited to the above embodiments, but is within the scope of the basic technical idea of the present invention. Various design changes are possible within this range. That is, the following aspects are within the technical scope of the present invention. It is included within. In each of the above embodiments, a steel rod was used as the tension member 1, but steel cables or F It may also be a rod made of RP. In the first and second embodiments, the sliding surfaces of the fixing plate 2 and the slider 3 are mutually flat surfaces. to touch. In this case, the fixation of the tension member 1 to the slider 3 allows rotational displacement. Pin fixation is preferred.
【0026】 ハ. 考案の効果 本考案の弾性支持免震構造物の転倒防止装置は上記構成よりなり作用を奏する ものであるので、以下の効果を有する。 請求項1〜3の発明については、上部構造にロッキング運動が生じた際、圧縮 側に配された本装置においても浮き上がりが生ぜず、有効に機能するので、全体 の転倒防止作用が向上する。 また、請求項1,2の発明においては、上記効果に加え、浮き上がりに直接的 に抵抗する鋼棒の上部はすべりが許容されるので、当該部では構造物間の相対的 変位よりも小さくなり、鋼棒の変位が小さくなり、かつ、過大な応力が生ぜず、 破損の原因が減少する。更には、ゴム弾性支承への負担が軽減し、ゴム弾性支承 を破損させることはない。 本転倒防止装置における定着板と滑動子との摺動作用により、その摩擦効果に より構造物間の振動の減衰をなすことができ、かつ、それらの曲面接触により、 定位置への復帰作用が生じ、構造物間の振動の減衰に寄与する。[0026] C. Effect of the idea The fall prevention device for elastically supported seismic isolation structures of the present invention has the above-mentioned structure and functions. As such, it has the following effects. Regarding the inventions of claims 1 to 3, when a rocking movement occurs in the upper structure, the compression Even when this device is placed on the side, it does not lift up and functions effectively, so the overall The fall prevention effect is improved. In addition, in the inventions of claims 1 and 2, in addition to the above effects, Since the upper part of the steel rod resisting is allowed to slip, the relative displacement, the displacement of the steel rod is small, and no excessive stress is generated. Causes of damage are reduced. Furthermore, the load on the rubber elastic bearing is reduced, and the rubber elastic bearing It will not damage the product. The sliding action between the fixing plate and slider in this fall prevention device reduces the friction effect. Vibrations between structures can be better damped, and their curved contact makes it possible to A return action occurs, contributing to the damping of vibrations between structures.
【図1】本考案の更に弾性支持免震構造物の転倒防止装
置の一実施例(第3実施例)の縦断面図である。FIG. 1 is a longitudinal cross-sectional view of an embodiment (third embodiment) of the fall prevention device for an elastically supported seismic isolation structure according to the present invention.
【図2】その変位状態を示す縦断面図である。FIG. 2 is a longitudinal cross-sectional view showing its displacement state.
【図3】本考案の他の実施例(第2実施例)の縦断面図
である。FIG. 3 is a longitudinal sectional view of another embodiment (second embodiment) of the present invention.
【図4】本考案の更に他の実施例(第3実施例)の縦断
面図である。FIG. 4 is a longitudinal sectional view of still another embodiment (third embodiment) of the present invention.
B…下部構造、G…上部構造、R…ゴム弾性支承、S…
転倒防止装置、1…鋼棒、2…定着板、3…滑動子、2
9…中央孔、41…定着平板B...lower structure, G...upper structure, R...rubber elastic bearing, S...
Fall prevention device, 1... Steel rod, 2... Fixing plate, 3... Slider, 2
9...Central hole, 41...Fixing flat plate
───────────────────────────────────────────────────── フロントページの続き (72)考案者 東野 雅彦 東京都江東区南砂2丁目5番14号 株式会 社竹中工務店技術研究所内 (72)考案者 下田 郁夫 神奈川県藤沢市桐原町8番地 オイレス工 業株式会社内 (72)考案者 池永 雅良 神奈川県藤沢市桐原町8番地 オイレス工 業株式会社内 ──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Masahiko Higashino 2-5-14 Minamisuna, Koto-ku, Tokyo Co., Ltd. Inside Takenaka Corporation Technical Research Institute (72) Creator Ikuo Shimoda Oiles Kogyo, 8 Kirihara-cho, Fujisawa City, Kanagawa Prefecture Within the company (72) Inventor Masayoshi Ikenaga Oiles Kogyo, 8 Kirihara-cho, Fujisawa City, Kanagawa Prefecture Within the company
Claims (3)
性支承が介装され、該ゴム弾性支承の鉛直剛性により上
部構造の荷重を支持し、その水平剛性により構造物間の
横振動を吸収する構造系において、長尺体よりなり、そ
の下端部を下部構造に固定され、その上部を上部構造の
凹部内に突入される引張り材と;上部構造に固設され、
前記引張り材をその中央に開設された孔部内に移動域を
存して受け入れ、その上面がすべり面に形成されてなる
定着板と;前記定着板のすべり面に摺動自在に載置さ
れ、前記引張り材の上端が固設される滑動子と;からな
り、前記引張り材には、前記ゴム弾性支承に載荷される
支持荷重の所要割合の引張り力が導入されてなる、こと
を特徴とする弾性支持免震構造物の転倒防止装置。Claim 1: A rubber elastic bearing is interposed in the space between the upper structure and the lower structure, the vertical rigidity of the rubber elastic bearing supports the load of the upper structure, and the horizontal rigidity prevents lateral vibration between the structures. In a structural system for absorbing water, a tensile member consisting of an elongated body, the lower end of which is fixed to the lower structure, and the upper part of which is inserted into the recess of the upper structure;
a fixing plate that receives the tensile material with a moving area in a hole formed in the center thereof, and has an upper surface formed as a sliding surface; a fixing plate that is slidably placed on the sliding surface of the fixing plate; and a slider to which the upper end of the tension member is fixed, and is characterized in that a tensile force of a required proportion of the support load loaded on the rubber elastic bearing is introduced into the tension member. Fall prevention device for elastic support seismic isolation structures.
曲面に形成され、滑動子の下面はこの凹曲面に合致する
凸曲面に形成されてなる弾性支持免震構造物の転倒防止
装置。2. An overturn prevention device for an elastic support seismic isolation structure according to claim 1, wherein the sliding surface of the fixing plate is formed as a concave curved surface, and the lower surface of the slider is formed as a convex curved surface that matches the concave curved surface. .
性支承が介装され、該ゴム弾性支承の鉛直剛性により上
部構造の荷重を支持し、その水平剛性により構造物間の
横振動を吸収する構造系において、長尺体よりなり、そ
の下端部を下部構造に固定され、その上部を上部構造の
凹部内に突入される引張り材と;上部構造に固設され、
前記引張り材の上端が固設される定着板と;からなり、
前記引張り材には、前記ゴム弾性支承に載荷される支持
荷重の所要割合の引張り力が導入されてなる、ことを特
徴とする弾性支持免震構造物の転倒防止装置。Claim 3: A rubber elastic bearing is interposed in the space between the upper structure and the lower structure, the vertical rigidity of the rubber elastic bearing supports the load of the upper structure, and the horizontal rigidity prevents lateral vibration between the structures. In a structural system for absorbing water, a tensile member consisting of an elongated body, the lower end of which is fixed to the lower structure, and the upper part of which is inserted into the recess of the upper structure;
a fixing plate to which the upper end of the tension member is fixed;
An overturn prevention device for an elastic support seismic isolation structure, characterized in that a tensile force corresponding to a required proportion of the support load loaded on the rubber elastic bearing is introduced into the tension material.
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JP1991054734U JP2560992Y2 (en) | 1991-04-30 | 1991-04-30 | Fall prevention device for elastically supported seismic isolation structures |
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JP1991054734U JP2560992Y2 (en) | 1991-04-30 | 1991-04-30 | Fall prevention device for elastically supported seismic isolation structures |
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JP2560992Y2 JP2560992Y2 (en) | 1998-01-26 |
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JP1991054734U Expired - Fee Related JP2560992Y2 (en) | 1991-04-30 | 1991-04-30 | Fall prevention device for elastically supported seismic isolation structures |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000240722A (en) * | 1999-02-23 | 2000-09-05 | Maeda Corp | Base isolation device |
JP2008019579A (en) * | 2006-07-11 | 2008-01-31 | Nippon Eisei Center:Kk | Fixture for tension member and tension member with fixture |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03257237A (en) * | 1990-03-06 | 1991-11-15 | Kajima Corp | Earthquake-proof device of laminated rubber |
-
1991
- 1991-04-30 JP JP1991054734U patent/JP2560992Y2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03257237A (en) * | 1990-03-06 | 1991-11-15 | Kajima Corp | Earthquake-proof device of laminated rubber |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000240722A (en) * | 1999-02-23 | 2000-09-05 | Maeda Corp | Base isolation device |
JP2008019579A (en) * | 2006-07-11 | 2008-01-31 | Nippon Eisei Center:Kk | Fixture for tension member and tension member with fixture |
JP4591891B2 (en) * | 2006-07-11 | 2010-12-01 | 株式会社日本衛生センター | Tensile member fixture and tension member with fixture |
Also Published As
Publication number | Publication date |
---|---|
JP2560992Y2 (en) | 1998-01-26 |
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